Improvement in steam piston-paokiig



WILLIAM WI-LsoN, 0F GALESBURG, ILLINoIs- Letters Patent No. 81,052, dated August 11, 1868.1

IMPROVEMENT IN STEAM PISTON-PACKING.

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TO ALL WHOM IT MAY CONCERN Beit known that I, WILLIA WILSON, of Galesburg in thecounty of Knox, and State of 'Illinois, have invented a new and improved Piston-Packing; and I do hereby declare that the following is a full, clear, and exact description thereof, which willenable those skilled in had to the accompanying drawings, forming part of this specification.

This invention relates to a new and improved metallic packing for pistons, and it consists in a peculiar construction and arrangement of rings and joints, as hereinafter fully shown and described, wherebythe packthe art to make and use the same, r'cferen'debeing ing is allowed to accommodate itself to a cylinder not perfectly true or round, and requires less strain than usual to adjust it or set it out, and is also allowed to travel over counter-bores with facility.

In the accompanying sheet of drawings Figure 1 is an endview of my invention, the disk of the follower nearest the eye being removed. Figure 2, a side sectional view of the same, taken inthe'line-x x, fig. 1. Similar letters of reference indicate corresponding parts. Arepresents the follower, composed of two circular disks, a a, one of which, a, is detachable, and is secured in position by a nut, b, an annular space being allowed between the two disks.

B is a ring, termed the skeleton, which bears against shoulders c, at the inner surfaces of the two disks, a a, near their peripheries, as shown in fig. 2.

t This skeleton is turned so as to have two rebates, d d, in its exterior, which leave a central projection, e, the outer surface of which is flush with the outer surfaces or edges of the disks a 'a.

G C are two rings, which are fitted in the rebates dd.

The interior of these rings are eccentric with the skeleton B, (see fig. 1,) and said rings are cut to receive pieces D, which have projectiops or tcnons, c, at each side, to fit in corresponding slots made in the ends of the rings, the main portion of the pieces D being equal in depth to the rings, anclhaving bevelled sides, which. 7

cause the rings to expand when moved laterally, (sec fig. 1,) the pieces D being stationary, and connected with the disks, which may be done by any suitable means. v I

The disks a a are perforated near their edges, as shown atf, and the skeleton B is also perforated, as shown at g, to form a communication between the two rebates d d.

The perforationsf are for the ingress of steam, which keeps the rings in contact with the skeleton.

The steam passes down between the rings and disks into the rebates d, and this steam does not escape while the piston is passing its centres.

It will be seen that both rings 0 O are set out with'but little steam, and are allowed to accommodate themselves to the interior or bore of the cylinder in the most perfect manner.

I claim as new, and desire to sccure by Letters Patent I The arrangement of the rings C G with the pieces D D, skeleton B, and the follower A, as herein set forth.

WILLIAM WILSON. Witnesses THOMAS EDMUND Coors, ALFRED COMBER- 

